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FKIE_CVE-2021-24119

Vulnerability from fkie_nvd - Published: 2021-07-14 13:15 - Updated: 2026-06-17 03:39
Severity
4.9 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Summary
In Trusted Firmware Mbed TLS 2.24.0, a side-channel vulnerability in base64 PEM file decoding allows system-level (administrator) attackers to obtain information about secret RSA keys via a controlled-channel and side-channel attack on software running in isolated environments that can be single stepped, especially Intel SGX.
References
cve@mitre.orghttps://github.com/ARMmbed/mbedtls/releasesRelease Notes, Third Party Advisory
cve@mitre.orghttps://github.com/UzL-ITS/util-lookup/blob/main/cve-vulnerability-publication.mdRelease Notes, Third Party Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2021/11/msg00021.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DRRVY7DMTX3ECFNZKDYTSFEG5AI2HBC6/Mailing List, Third Party Advisory
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EYJW7HAW3TDV2YMDFYXP3HD6WRQRTLJW/Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/ARMmbed/mbedtls/releasesRelease Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/UzL-ITS/util-lookup/blob/main/cve-vulnerability-publication.mdRelease Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/11/msg00021.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/06/msg00034.html
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DRRVY7DMTX3ECFNZKDYTSFEG5AI2HBC6/Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EYJW7HAW3TDV2YMDFYXP3HD6WRQRTLJW/Mailing List, Third Party Advisory
Impacted products
Vendor Product Version
arm mbed_tls *
fedoraproject fedora 33
fedoraproject fedora 34
debian debian_linux 9.0
debian debian_linux 10.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
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      "source": "cve@mitre.org"
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  ],
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Trusted Firmware Mbed TLS 2.24.0, a side-channel vulnerability in base64 PEM file decoding allows system-level (administrator) attackers to obtain information about secret RSA keys via a controlled-channel and side-channel attack on software running in isolated environments that can be single stepped, especially Intel SGX."
    },
    {
      "lang": "es",
      "value": "En Trusted Firmware Mbed versi\u00f3n TLS versi\u00f3n 2.24.0, una vulnerabilidad de canal lateral en la decodificaci\u00f3n de archivos PEM base64, permite a atacantes a nivel de sistema (administrador) obtener informaci\u00f3n sobre claves RSA secretas por medio de un ataque de canal controlado y de canal lateral en el software ejecut\u00e1ndose entornos aislados que pueden ser de un solo paso, especialmente Intel SGX"
    }
  ],
  "id": "CVE-2021-24119",
  "lastModified": "2026-06-17T03:39:25.587",
  "metrics": {
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      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "NONE",
          "baseScore": 4.0,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N",
          "version": "2.0"
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        "obtainAllPrivilege": false,
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  "published": "2021-07-14T13:15:08.100",
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    },
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    }
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          "value": "CWE-203"
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      "source": "nvd@nist.gov",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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